Edgar Thompson Works

Braddock residents and environmental advocates rallied against emissions from U.S. Steels’ Edgar Thomson Works at a public hearing Wednesday night. Speakers voiced opinions on a new operating permit for the plant proposed by the Allegheny County Health Department.

A plume of black smoke and flames were spotted at U.S. Steel’s Edgar Thomson works in Braddock on Thursday morning. The event prompted concern from local environmental groups about how the incident could affect air quality in the region.

The plan faced local opposition for years.

Pittsburghers are all too familiar with the smell of sulfur dioxide emissions, but it's invisible. Now, residents can get a better visual of how air…